%0 Conference Proceedings %T Effect of Deficit Irrigation and Nitrogen Fertilization on Fermentation Kinetics of Prenial Ryegrass (Lolium Perenne) Using In vitro Gas Production %A Valizadeh, Reza %A S.E.Ghiasi %A Mojtahedi, Mohsen %A N.Azimi %J The 14 th AAAP Animal Science Congress %D 2010